Double-acting force-pump.



B. H. CLASPY.

DOUBLE ACTING FORCE PUMP.

APPLICATION FILED MAY4| 1914- Patented May 9, 1916.

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B. H. CLASPY.

- DOUBLE ACTING FORCE PUMP.

APPLICATION FILED |/IAY4.19I4.

1,182,66. Patented May 9,1916.

2 SHEETSSHEET 2.

TINITEEU TA BERT H. CLASPY, OF DOWAGIAC, MICHIGAN.

DOUBLE-ACTING FORCE-PUMP.

Specification of Letters Patent.

Patented May a, rare.

Application filed. May 4, 1914. Serial No. 836,362.

To all whom it may concern:

Be it known that I, BERT H. CLASPY, a citizen of the United States,residing at Dowagiac, Michigan, have invented certain new and usefulImprovements in Double- Acting Force-Pumps, of which the following is aspecification.

This invention relates to double acting force pumps.

The objects of this invention are: First, to provide a force pump havingimproved means for compensating for the wear on the moving parts and forkeeping them tight at all times. Second, to provide a pump of the classdescribed, having automatic means for relieving the pressure when itreaches a predetermined point. Third, to provide an improved force pumpin which a single turning plug is used to control the flow of water.

Further objects, and objects relating to details and economies ofstructure and operation will definitely appear from the detaileddescription to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearlyillustrated in the accompanying drawing forming a part of thisspecification, in which:

defined and Figure I is a perspective view of a. pump embodying myinvention. Fig. II is a. longitudinal sectional view on the line 22 ofFigs. I and III. Fig. III is a transverse sectional view on the line 33of Fig. II. Fig. IV is a detail view in side elevation of the face plugcovering the valve chamber, showing thereon, the means forcontrollingthe pressure on the turning plug. Fig. V is a detail sectional view onthe line 5-5 of Fig. II. Fig. VI is a detail sectional view on the line66 of Fig. III. Fig. VII is a detail sectional. view on the line 7-7 ofFig. III. Fig. VIII is a transverse sectional view similar to Fig. II,but showing a modified form of my invention. Fig. VIII is a longitudinalsectional view through the piston shown in Fig. VIII. Fig. IX is atransverse sectional view on the line 99 of Fig. X, showing a stillfurther modified form of my invention. Fig. X is a transverse sectionalview on the line 1010 of Fig. IX. Fig. XI is a detail sectional view onthe line 1l-11 of Fig. XII. Fig. XII is a view in side elevation, of theturning plug shown in Fig. IX, showing in particular, the entrances ofthe inlet and outlet ports.

In the drawing, similar reference characters refer to similar partsthroughout the several views and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawing, 1 is the main pump casingprovided on either side with the cylindrical sockets 3-3 in whichthesections of pipe 2, 2 are threaded. These pipes, together with thesockets, form piston chambers in which the pistons 4:, i work. Thesepistons i have recesses i therein which serve as compression chambers tohelp take care of the back pressure on the pistons. These pistons arepivoted to the lower ends of links 6, 6, and the upper ends of saidlinks are pivotally connected at points 7, 7 on either side of thefulcrum 11 to the lever S provided with the handle 9. In the centralpart of the casing 1 is provided a shallow socket in which is threaded asection of pipe carrying the T-coupling 13, at the upper end of which isthreaded the fork-like member 10, upon which the lever 8 is fulcrumed.In the lower part of the casing 1 the inlet pipe 12 is threaded into ashallow socket provided therefor. The spout 1% is carried by theT-coupling 13.

The casing 1 is provided with a tapered seat 15 extending transverselythereof and open at the front. In said seat is disposed the turning plug16 which is tapered to fit snugly therein, leaving a space between therear of the turning plug and the back wall of the seat, and said seat isclosed by a face plug 17 so as to provide a space between the front ofthe turning plug and said face plug. The plug 17 carries a pin 19threaded therein and said pin has an enlarged portion which slides in atransverse opening extending through said turning plug. The outer end ofsaid pin is'provided with a nut 19 for adjusting the same and carries apointer 19 pointing to suitable indicia provided on the face plug toindicate the pressure exerted by the spring to hold the turning plug inits seat.

A hearing plug 20 is threaded into the rear end of the transverseopening in said turning plug and the end of the bearing pin 21 threadedinto the rear wall of the casing bears against said plug 20. The pin 21is provided with a lock nut 22 to secure it in adjusted position. Bythis means the distance between the back of the turning plug 16 and therear wall of the valve seat is determined, and this may easily be adjusted to compensate for the wear of the parts.

A coiled spring 18 is seated in the transverse opening in the turningplug against the bearing plug 20 and at its outer end bears against theenlarged portion 18 on the pin 19. It will readily be seen that thespring 18 tends to hold the turning plug into engagement with the end ofthe pin 21 while said turning plug is free to slide against the tensionof the spring toward the front of the casing.

The casing 1 is provided with a port 42 leading from the inlet pipe 12into the turning plug seat and with a port 43 leading from said seatinto the outlet pipe. It is also provided on each side with a pair ofports 44, 45, and 46, 47, leading from the turning plug seat into therespective piston chambers 3, 3. The casing is also provided on eachside with slot like openings 48 and 49, through which the trip pins 34and 35, which are threaded into the turning plug at diametricallyopposite points, project into the piston chambers so as to be engaged bythe pistons 4 on the down stroke. The turning plug is provided with apair of ports 50 and 53; and a second pair of ports 51 and 52, which aresymmetrically placed with respect to each other. These ports are sosituated that when the turning plug is disposed in its seat so thatports 50 and 53 are open, connecting the inlet port 42 with the righthand piston chamber and the left hand piston chamber with outlet port43, ports 51 and 52 are closed. Likewise, when the turning plug isrotated to open ports 51 and 52, ports 50 and 53 are closed. These portsare long and slot-like in their nature and are somewhat curved in crosssection, as is clearly shown in Fig. V. A vent 36 leads from port 52 tothe space in the rear of the turning plug and a second vent 37 leadsfrom port 51 to the space in front of the lug.

In Figs. VIII and VIII I have illustrated a modified form of myinvention in which I use a turning plug identical With that shown inFig. II. In this case, 12 is the inlet pipe and 13 is the outlet pipe.

Ports 26 and 27 are provided in the casing leading from the outlet pipeinto the turning plug seat and similar ports 24 and 25 are providedleading from the turning plug seat to the inlet pipe. At either side ofthe casing are provided ports 28 and 29 leading from the turning plugseat into the piston chambers and through which the trip pins 34 and35pass. The turning plug is provided with ports 38, 39, 40 and 41identical with those shown in Fig. II. Ports 39 and 40 are provided withvents 36 and 37 similar to those shown in Fig. II.

A flat spring clip 34 is attached to the inner wall of the recess 4 andthe lower end of said spring projects beyond the lower end of thepiston, as clearly shown in Fig. VIII so as to engage the end of theadjacent trip pin, as pin 34. It will be seen that by this arrangement,as the piston starts on its upstroke the spring clip 34 will carry withit the pin 34 and rotate the turning plug so as to close ports 39 and 40and open ports 38 and 41. The other piston is likewise provided with asimilar spring clip to engage trip pin 35 and rotate the turning plug onthe beginning of its upstroke.

In Fig. IX I have shown a still further modified form of my invention,in which the main pump casing is provided with ports identical withthose shown in Fig. VIII, and the ports in the turning plug aremodified. In this modification there is provided the port 30 which leadsfrom the inlet port 25 to the piston chamber port 28, the port 31 whichleads from the inlet port 24 to the piston chamber 29. Port 32 leadsfrom port 29 to the outlet port 26 and port 33 leads from port 28 to theoutlet port 27. hese ports are practically square in cross section andtheir entrances and disposition in the turning plug is clearly shown,particularly in Figs. X and XI. Ports 33 and 31 are also provided withrelease vents 36 and 37.

From the description of the parts above given, the operation of thestructure should be very readily understood. With particular referenceto the form of my invention shown in Fig. II, it Will be observed thatas the left hand piston moves down in the piston chamber that the righthand piston moves up. Ports 50 and 53 are open, and as the right handpiston 4 moves up causing a partial vacuum in the piston chamber, thewater is drawn into the right hand piston chamber through ports 42, 50and 44. During the up-stroke of the right hand piston, the left handpiston will be traveling clownward in the piston chamber and forcing thewater that has been drawn into said chamber. on the previous stroke outthrough ports 47, 53 and 43, into the outlet pipe. When the pistonscomplete their stroke, the left hand piston 4, which is movingclownwardly, strikes the end of the trip pin 35 and the turning plug isrotated to close ports 50 and 53 and open ports 51 and 52. Thus on thenext stroke of the piston, water will be drawn into the left hand pistonchamber 3 through ports 42, 51 and 46 and forced out of the right handpiston chamber 3 through ports 45, 52 and 43 into the outlet pipe 13.

I11 the modification shown in Fig. VIII, 12 is the inlet pipe, and 13 isthe outlet pipe. The turning plug, in this modification, is the same asthat shown in Fig. II. With the ports arranged as I have shown in Fig.VIII, upon the beginning of the upstroke of the righthand piston 4spring clip 34 will carry with it trip pin 34 and rotate the turningplug so that ports 38 and 41 will be opened and ports 39 and 41 will beclosed. WVater will then be drawn through ports 24 and 41 into the righthand piston chamber 23 while the descending piston in the left handpiston chamber will force water out of the said piston chamber throughports 38 and 27 As the left hand piston 4 starts on its upstroke, a flatspring clip (not shown) similar to clip 34 engages the pin 35 androtates the turning plug closing ports 38 and 41 and opening ports 39and 40. Water will then be drawn into the left hand piston chamber 3through ports 29 and 40 and forced out of the right hand piston chamberthrough ports 39 and 26.

If it is desired to reverse the action of the pump so as to make 13 aninlet pipe and 12 an outlet pipe, all that is necessary to be done is toomit the spring clips 34 on the pistons. In that event, as the righthand piston 4 completes its down stroke it will engage the pin 34 androtate the turning plug opening ports 39 and 40 and closing ports 38 and41. During the upstroke of the right hand piston 4, water will be drawninto said right hand piston chamber through ports 26 and 39 and forcedout of the left hand piston chamber by the descending left hand pistonthrough ports 40 and 25. At the end of the down stroke of the left handpiston it will engage pin 35. rotate the turning plug, close ports 39and 40 and open ports 38 and 41. Water will consequently be forced outof the right hand piston chamher 3 through ports 41 and 24 and drawninto the left hand piston chamber 3 through ports 27 and 37. It willthus be seen that by the use of the clips 34 the action of the pumpcan'be reversed so as to change the direction of flow through it. Inthis form of the invention, ports 28 and 29 serve to connect the pistonchambers with the turning plug seat and at the same time to permit theoperation of the trip pins 34 and 35 therethrough.

In the modification shown in Figs. IX to XII, the casing and theportstherein are the same as in Fig. VIII, while the ports in theturning plug are difierently disposed. With the ports as I have shown inFig. IX, water is drawn into the right hand piston chamber 3 on theupstroke of the piston, through ports 25, 30 and 28, and at the sametime water is forced out of the left hand piston chamber 3 by thedescending piston through the ports 29, 32 and 26. At the end of thestroke the left hand piston 4 strikes the trip pin 35 and moves theturning plug to a position in which ports 30 and 32 are closed and ports31 and 33 are opened. At the next stroke of the piston water is drawninto the left hand piston chamber 3 through ports 24, 31 and 29 and isforced out of the right hand piston chamber 3 through ports 28, 33 and27.

In each of the three forms of my invention which Ihave here shown, Iprovide means for relieving the pressure when it exceeds a predeterminedamount. Ihis control consists of the vent 36 which leads from one of theoutlet ports in the turning plug to the space at the rear of said plug.A vent is likewise provided in the corresponding inlet port leading intothe space in front of the turning plug. By means of the screw threadedpin 19, the enlarged portion 18 can be moved inwardly to change thepressure exerted by the spring 18. Ihe pointer 19" indicates thepressure of said spring.

IVhen the pressure created in the piston chamber on the down stroke ofthe piston exceeds a predetermined amount so that water is forcedthrough vent 36 into the space back of the turning plug at a pressuregreater than the pressure exerted by the spring 18 to hold the turningplug in its seat, the plug will be moved forwardly to relieve thepressure and allow the water to escape around the plug. Vent 37communicates with a port which is open when the port containing the vent36 is open, and hence, when the pressure exceeds the pre scribed amount,and the turning plug is moved forward, vent 37 serves to relieve the aircushion formed between the front of the plug and the face plug 17 so asto permit the turning plug to be moved forward in its 115 seat.

The pressure exerted by spring 18 may be changed by adjusting the pin19. IVhen, on account of wear, the plug 16 does not fit tightly in theseat, it can be allowed to move to the rear of the seat by adjusting thebearing pin 21.

I am aware that the particular embodiment which I have here shown issusceptible of considerable variation Without departing from the spiritof my invention, and, therefore, I do not wish to be restricted to thesame. I have found, however, that this particular form is to bepreferred and, therefore, I desire to claim the 1 same specifically aswell as broadly, as indicated by my appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a pump of the class described, the combination of a pump casing, atapered valve chamber extending transversely of said casing, pistonchambers on either side of said valve chamber, pistons working in saidpiston chambers, suitable means for reciprocating said pistons wherebythey are moved simultaneously in opposite directions, inlet and outletpipes connected to said casing, ports in said casing connecting saidinlet and outlet pipes and said piston chambers with said valve chamber,a tapered turning plug seated in said chamber, trip pins carried by saidplug and extending through suitable openings in the casing into thepiston chambers in position to be engaged by the descending piston, apair of ports in said turning plug comprising an inlet port connectingsaid inlet pipe with one of said piston chambers and an outlet portconnecting the other of said piston chambers with the outlet pipe, and asecond pair of ports in said turning plug similarly connecting the inletand outlet pipes with the piston chambers, the first pair of ports beingso disposed in the turning plug as to be closed when the second pair isopen, a vent connecting one of said outlet ports with the space betweenthe turning plug and the back of the chamber, and a second ventconnecting the corresponding inlet port with the space in front of saidturning plug, all coacting substantially as described for the purposespecified.

2. In a pump of the class described, the combination of a pump casing, atapered valve chamber extending transversely of said casing, pistonchambers on either side of said valve chamber, pistons working in saidpiston chambers, suitable means for reciprocating said pistons wherebythey are moved simultaneously in opposite directions, inlet and outletpipes connected to said casing, ports in said casing connecting saidinlet and outlet pipes and said piston chambers with said valve chamber,a tapered turning plug seated in said chamber, trip pins carried by saidplug and extending through suitable openings in the easing into thepiston chambers in position to be engaged by the descending piston, apair of ports in said turning plug comprising .an inlet port connectingsaid inlet pipe with one of said piston chambers and an outlet portconnecting the other of said piston chambers with the outlet pipe, and asecond pair of ports in said turning plug similarly connecting the inletandvoutlet pipes with the piston chambers, the first pair of ports beingso disposed in the turning plug as to and said piston chambers with saidvalve I chamber, a tapered turning plug, a pair of ports in said plugcomprising an inlet port connecting said inlet pipe with one of saidpiston chambers and an outlet port connecting the other of said pistonchambers with the outlet pipe, a second pair of ports in said turningplug similarly connecting the inlet and outlet pipes with the pistonchambers, the first pair of ports being so disposed in the turning plugas to be closed when the second pair is open, and means, operated by thepistons at the end of the stroke, for closing one pair of ports andopening the other, all coacting substantially as described for thepurpose specified.

4. In a pump of the class described, the combination of a pump casing, avalve chamber therein, piston chambers on either side of said valvechamber, pistons working in said piston chambers, inlet and outlet pipesconnected to said casing, ports in said casing connecting said inlet andoutlet pipes and said piston chambers with said valve chambers, aturning plug seated in said valve chamber, a pair of ports in said plugcomprising an inlet port connecting said inlet pipe with one of saidpiston chambers and an outlet port connecting the other of said pistonchambers with the outlet pipe, a sec- 0nd pair of ports in said turningplug similarly connecting the inlet and outlet pipes with the pistonchambers, the first pair of ports being so disposed in the turning plugas to be closed when the second pair is open, means operated at the endof the piston stroke whereby one pair of ports is opened and the otherpair is closed, and means whereby the turning plug is forced from itsseat when the pressure in the pump exceeds a predetermined amount, allcoacting substantially as described for the purpose specified. I

5. In a pump of the class described, the combination of a pump casing, atapered valve chamber extending transversely of said casing, pistonchambers at each side of said valve chamber, ports connecting said valvechamber with said piston chambers, pistons working in said pistonchambers, a spring clip carried by each of said pistons,

a tapered turning plug seated in said valve Ila)- chamber, ports in saidturning plug adapted to communicate with the ports leading from saidvalve chamber to said piston chambers, trip pins carried by said turningplug and extending into said piston chambers, said trip pins being sodisposed as to be engaged by the spring clips carried by said pistonswhereby the turning plug is rotated at the beginning of the upstroke ofthe piston, all coacting substantially as described for the 10 purposespecified.

In Witness whereof, I have hereunto set my hand and seal in the presenceof a Witness.

BERT H. CLASPY. [1 s.] Witness:

LUELLA G. GREENFIELD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatenie. Washington, D. C.

